Sora Oto

"Heaven" is an organization that utilizes Messengers of Death to ferry deceased souls to their afterlife. These messengers are sorted according to their proficiency, and Uka is classified as a "Rank C" dropout, despite her lackadaisical demeanor. However, she is unexpectedly paired with Tsumugi, an egotistical "Rank A" top performer. Additionally, Volume 1 of this manga includes the bonus chapters "Hane Oto, Kimi Oto."